WASHINGTON — The Obama administration is preparing a plan to set up a new military base in Iraq's Anbar province and send several hundred additional trainers and advisers to help bolster Iraqi forces that have struggled in the fight against Deash (the so-called IS) militants there, US officials said on Tuesday. President Barack Obama is expected to gibe final approval to expand the US military contingent in Iraq, a source close to the discussions said, marking the first significant adjustment in his strategy since the insurgents seized Anbar's capital Ramadi last month. US officials, speaking on condition of anonymity, expressed hope that a even a modestly beefed-up US presence could help Iraq forces plan and carry out a counterattack to retake Ramadi. But many critics have said previously that the current 3,100-strong American contingent of trainers and advisers is far from enough to turn the tide of battle. Obama is expected to stick to his stance against sending American troops into combat or even close to the front lines, according to the officials, who spoke on condition of anonymity. But increased US numbers in Iraq's volatile Sunni heartland raises could mean running greater risks. The proposed build-up comes as Obama's anti-Daesh policy faces mounting criticism at home and abroad. US-backed Iraqi forces have made only halting progress against Daesh militants who seized about a third of Iraq over the past year in a brutal campaign marked by mass killings and beheadings. Obama said on Monday the United States did not yet have a “complete strategy” for training Iraqi security forces to reconquer land lost to Islamic State fighters. Since the fall of Ramadi, which drew harsh US criticism of the Iraqi military performance, Washington has begun to speed up supplies of weapons to the government forces and examine ways to improve the training program. With Obama closing in on a decision, one US official speaking on condition of anonymity said the increased US deployment would likely entail several hundred more troops. A second official said the figure would be less than 500. While it was unclear exactly how many would be deployed directly to Anbar, one US official said many of those sent to the province would be stationed at a new training base there. US forces have already conducted training at the Al-Asad military base in western Anbar. Speculation on the location a new installation has focused on the area near the town of Habbaniya, the site of an Iraqi army base. A new site would allow US forces to provide greater support for Sunni tribal fighters, who have yet to receive all of the backing and arms promised by the Shiite-led government in Baghdad. “We are considering a range of options to accelerate the training and equipping of Iraqi security forces in order to support them in taking the fight to Daesh. Those options include sending additional trainers to Iraq,” said Alistair Baskey, a spokesman for the White House National Security Council. But he declined to provide details. General Martin Dempsey, chairman of the Joint Chiefs of Staff, made clear during a visit to occupied Jerusalem that there were no plans to fundamentally alter Obama's military strategy that has so far kept US ground troops off the front lines. “We've made some recommendations on potential enhancements to the training and equip mission,” Dempsey said, citing options including new training sites. Speaking to reporters traveling with him, Dempsey did not say how many extra US troops may be involved. Another senior US military official said only that the number would be modest. — Reuters